Valve-grinding tool



c. GlESER AND G. SHAFFE'R.

VALVE GRINDING TOOL.

APPLICATION FILED FEB. 4, 1.920.

Patented Jill 13, 1920.

l/uarri'ors UNITED STATES PATENT OFFICE.

CARL GIESEB, AND GLENN SHAFFEB, or DES MoINEs, IOWA; SAID SH-AFFER 'ASSIGNOR' T0 SAID GIESER. x r

' VALVE-GRINDING root.

Application filed February 4, 1920. Serial N0. 356,340.

To all whom it may concern: a

Be it known that we, CARL Grnsun .and GLENN SHAFFER, citizens of the United States, and residents of Des Moines, in the county of Polk and State of Iowa, have invented a certain new and useful Valve- Grinding Tool, of'which the following is a specification.

Anobject of our invention is to provide a valve grinding tool of simple, durable :and inexpensive construction, which is so designed that it is not necessary to remove the valve casing, when it is desired to grind the movable valve closure member.

More particularly it is our object to provide a valve grinding tool,.having gripping members on its lower end, that areadapted to gripand engage a movable valve closure member, whereby rotation of the tool will cause the valve member to rotate in its seat and thus cause it to'be ground.

Still a further object isto provide a-tool that-can be adjusted, soas to fit movable valve closure members of various sizes, the tool being provided with ahandlefor wrench engaging portion at its upper end, whereby it may be easily rotated.

Still another object is to provide 'a'cen- .tering device, which is slidably .mounted upon the tool for use, when large valves are being ground, the centering device being provided with locking means, for absolutely looking it to the valve casing. 7 Still a further objectJis to provide gripping fingers onithe tool, which are adjust.

A able to various sizes,-and adapted to engage :the movable valve member in the portion,

which'is designed to be secured to the valve stem. I

- With these and other objects in view, our invention consists in the construction, arrangement and combination of, the various 7 parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in our cla1ms,

and illustrated in the accompanying drawings, inwhich: V

Figure 1 shows a side elevation of our device with the centering device attached thereon, parts being broken away and shown in section, in order to better 1 illustrate the construction.

Fig. 2-shows a view ofthe gripping 'fingers attached to=the-movable valve member,

the centering device being omitted.

' Fig. 3 shows an enlarged, detail viewof the gripping fingers, the dotted lines showing one of the adjusted positions of the fingers.

Fig. 4 shows a view of the gripping fingers in engagement with the movable valve member; and I v Fig. 5 shows a central, sectional view taken on line 55 of Fig.1.

In the accompanying drawings, we have used the reference numeral 10 to indicate the ordinary valve casing, which isprovided with a valve seat 11 and a movable valve closure member 12. i

Secured to the valve casing 10 are the pipes 13 and 14. The movable valve closure member 12 is provided with an annula screw-threaded recess 15.

the recess '15. It willbe understood that the valve heretofore described isof the ordinary common kind, and that our 1 device I is adapted to grind the valve-member 12in'its seat 11 so 'as'to makean absolute'lyperfect tight joint.

' When it is desired to grind the valve member 12, the valve stem is taken out and our tool is then attached in its place; Our tool consists of a casing 16, which is;-provided intermediate of itsends with opposite registering openings 17.' Thecasing'16 is provided at its upper end with a squared 'portion18, which is designed to receive a handle I or the like 19.

Specification of Letters Patent. I Patented July 13 1920;

It will be understoodthat-the handle19 is detachable, and a wrench or ordinary brace -may be used for causing the casing member 16 to rotate.-

At the lower-end of the casing 16, we provide gripping fingers 20., The gripping fingers 20 are pivoted to'the lower end of the casing 16, by means of the pins 21 The lower-end of each of the fingersQO is pivoted at 21. The-outer-lowenside of each of the fingers 20 is provided with a knurled portion 22. The knurled portion '22 is designed to engage the screw-threaded portion of the recess 15. V

In order to cause the fingers 20 to engage and fir'mly'hold the valve member -12,we have provided a rod' 23, which has a screwthreaded portion 24c near-its upper end.

Moun d on thescrew-threaded portion 24 .Fixed on the screw-threaded portion 26 of the rod 23 is the nut 27. The nut 27 is cone-shaped, and is adapted to have its sides rest adjacent to the beveled surface 21 of the fingers 20, when it is in its lowermost position.

From the construction of the parts heretofore described, it will be seen that by rotating the nut 25, it will cause the rod 23 to be vertically adjusted and thus cause the nut 27 to extend the fingers outwardly on their pivots.

It will be seen that we can adjust our fingers to the various positions, whereby various sizes of movable valve closure members may be taken care of.

In order to use our device on small valves, we remove the nut 27 from the lower end,

. and by moving the rod 23 into its uppermost position, we are then able to .move the fingers close together, so that real small valves may be ground. This is shown in Fig. 20f the drawings; the nut'27 being removed and the screw-threaded .portion 26 being plainly shown.

When we use-our device on large valve members, it is then necessary to have some sort of a bearing or centering device to insure the operator that the valve is being ground absolutely accurate.

In order to accomplish this, we have provided a centering device A, which comprises a cone-shaped member 28, which has a 'hub 29. The hub 29 is designed to rest adjacent to the casing 16. j r 7 From the construction justdescribed, it will be seen that the centering device is slidably mounted on the casing 16, and can 7 readily be removed when the use of it is not needed; that is when the tool is being used .on small work.

WVhen the centering device A is used, it is necessary to lock it to the valve 10. In order to accomplish this, we have provided.

the bars 30, which-are provided with slots 31. A machine bolt 32 extends through the slot; 31 .and extends into' the coneshaped member 28.- The cone-shaped member or centering devicejust described is designed tobe received in the openingof the valve stem. V V

7 On the lower ends of the rods 30, we provide the-set screws 33, which can be tightened or loosened, as desired.

WVh'en. the valve'stem opening of the valve casing10 is large, the'centering device A will be received fartherinto the valve casing 10, and therefor'it is necessary 0 {id- -its original operative position.

against the rim or upper edge of the opening inthevalve casing 10.

When it is desired to adjust the bar 30,

the machine bolt 32 is loosened and the bar is then moved to any desired position and is locked by the machine bolt 32. The bar 30 is receivedin a recess in the coneshaped member 28 and this prevents any pivotal movement, and permits'only vertical movement of the bar 30.

By providing the'centering device A, it

enables the tool to be placed in the valve, 7

and to be held absolutely vertical, so that during the grinding of the valve, it will be held in such position, that when'the 'valve stem is again placed in the valve, the movable valve member will fit absolutely accurate with the valve seat 11.

In order to rotate the tool, at a high rate of speed, the handle member 19 isiremoved and an ordinary brace is placed over the squared portion 18, and then by rotating the brace the tool will be operated, and thus cause the valve to be ground into position.

Some of the advantages of our device are that we are able to grind the valve seat with the movable valve member and thus when they are ground together, the joint will'be more accurate than could be possibly made,

if some independent tool is used.

Another advantage of our tool is that we are able to grind the valve seat without removin the valve casin from its i e connections. It will be understood that this saves a great deal of labor and time, and it is very important sometimes to have .the

valve seat perfectly, and yet-it would be a serious handicap, if it werenecessary to remove the valve casing from its operative position, in order to have it ground: each time.

Another advantage of our deviceis' that it is adjustable, so that it may operate in various sizes of valves, and when ittis operated ina large type of valve, we have provided a centering device, which will tend to cause the tool to be vertical relative to the valve seat, and thus causesour tool to work much more efliciently, since we have something to steady and hold the tool in proper position. After the valves have been 2.

ground, the valve stem is again screwed into the screw-threaded portion of the-recess 15,

and'the packing is screwed ontothe' valve casing 10, which places the valve back in Some changes may be made in the construction and arrangement of the parts'of.

our improved device, without, departing from the essential features and'purposes of our invention, and 1 it is our intention to cover by our claims, any modified forms of structure or use of mechanical equivalents, which may be reasonably included within their scope.

l/Ve claim as our invention:

1. In a device of the characterdescribed, a casing having a'plurality of pivoted fingers on its lower end, said fingers being designed to grip and engage a movable valve closure member, a centering device slidably mounted upon said casing, said centering device comprising a cone-shaped member adapted to extend partially into the valve stem opening of a valve casing, vertically adjusted bars fixed to said cone-shaped member, said bars being provided adjacent to their lower ends with a set screw, whereby the set screws may be tightened to engage the valve casing and hbld said centering device in position, whereby it will form a bearing for said casing when the casing is being rotated in order to grind the movable valve closure members in the valve seat.

2. In a tool for grinding valves, a casing having a plurality of fingers pivoted to its lower end, and a-squared wrench engaging portion at its upper end, said fingers being designed to grip movable valve closure members, said casing being provided with opposite registering openings intermediate of its ends, a screw-threaded rod adjustably" mounted in said casing, a nut on said rod and adapted to extend through said openings, a member on the lower end of the rod adapted when vertically moved to cause the fingers to be moved outwardly for engaging movable valve closure'members of various sizes, a centering device slidably mounted on said casing, and adapted to extend partially into the valve stem opening of a valve, whereby when the tool is rotated, the centering device will form a bearing for holding the tool in the same position during the operationof it;

3. In a device of the class described, a casing having adjustable means pivoted thereon designed to grip and engage movable valve closure members of various sizes, a centering device slidably mount-ed upon said casing and adapted to be partially received in a Valve casing, said centering de-" vice including a cone-shaped member, and

means mounted on said cone-shaped member, whereby it may be locked to the valve casing, the centering device forming a bearing when the casing member is rotated.

Des Moines, Iowa,January 17 1920.

CARL GIESER. GLENN SHAFFER. 

